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I believe the C18 has a slightly sorter motor than the t18 hence the slight difference in power.

Also I love my CXS but hate the C18 form factor. The CXS feels so right in the hand, like an extension of your hand. But the C18 is so much heavier that i think it feels unwieldy. It feels front heavy and a bit of a strain. I chose the T18 and find it far more comfortable than the C18. Your grip on the T18 is under the motor rather than behind it creating a more balanced feel. Also that much power in the C-Drill form is harder on the wrist as your grip has less leverage against the torque of the drill. Also with your hand behind the motor it is actually less able to fit in tight spaces.

I have a T18+3 a CXS and a Dewalt Impact Driver. CXS gets the most use by far. The T18+3 is great and the different chuck options are terrific. The form factor of the CXS is great but I am happy the the T factor for the heavier drill. I considered the more powerful Festool drills but in the end went with the T18 and kept the Dewalt which I use occasionally.

I'm very surprised the PDC is only 100g more than the T18. Are you sure? The T18 feels much lighter in use than the PDC. .

oups, I was wrong, from Festool's website :

- T18+3 = 1,7 kg- DRC = 1,8 kg- PDC = 1,9 kg

The T18 is 200g lighter, and surely more balanced ?I will try to take them in hand at my local dealer.

Actually i use most often the CXS. The T18/PDC will be used at 20% off time. The weight is not really the problem. I'm just lost for choose :-(

Having owned the T18, C18 and now currently the PDC I can tell you first hand that the difference in weight between the PDC and T18 is negligible. I'm still shocked at how light the PDC is every time I pick it up. And compact for a hammer drill. Slap a 2.6ah battery on it and it's even lighter.

Oh and the CXS is awesome too. I picked that up first along with the Bosch ps32. Usually whichever is closer.